Abstract: The present invention provides a valve stent used safely comprising a supporting net frame, and a flared section connected to an end of the supporting net frame; wherein the flared section is connected to all end nodes located at a corresponding side of the supporting net frame, the flared section is grid shaped, and a number of intersection points of the grids decreases along an axial direction away from the supporting net frame. The present invention also provides a valve replacement device comprising an above valve stent and a prosthesis valve fixed inside the supporting net frame.

Abstract: The present invention provides a valve stent used safely comprising a supporting net frame, and a flared section connected to an end of the supporting net frame; wherein the flared section is connected to all end nodes located at a corresponding side of the supporting net frame, the flared section is grid shaped, and a number of intersection points of the grids decreases along an axial direction away from the supporting net frame. The present invention also provides a valve replacement device comprising an above valve stent and a prosthesis valve fixed inside the supporting net frame.

Abstract: A deodorizing toilet seat pad comprises essentially an ozone-generating means, a toilet seat pad, a base plate, a fan, and an active carbon container. Wherein, said ozone-generating means is provided on the rear end of said toilet seat, while said toilet seat pad is engaged pivotally on said ozone-generating means and is assembled tightly with said base plate such that a hollow channel is formed between said base plate. One or more air scoops are provided at the inner peripheries of said toilet seat pad and said base plate. Said fan is mounted at the air outlet on said ozone-generating means. Said active carbon container is provided on the outside of said fan.